JP5124742B2 - Eyepoint detection method - Google Patents

Description

  The present invention relates to an eye point detection method for measuring the position of an eye point of an eyeglass lens or confirming whether the measured eye point position is correct, and an eye point detection optometry mask used in the method. Is.

If the eye point position set for the spectacle lens is deviated from the actual eye point position of the wearer, the eyes may become tired or the eyesight may be deteriorated when viewing the object. For this reason, conventionally, various means for accurately setting the customer's eye point position on the spectacle lens or confirming whether the set eye point is at the correct position have been proposed.
For example, the technique described in Patent Document 1 captures a customer's face wearing a wearing frame and calculates an eye point based on the wearing frame data and the photographed video data. This makes it possible to accurately set the eye point position.
The technique described in Patent Document 2 is an improvement of eye point position confirmation means called a mirror method, and the eye point position set for a spectacle lens adjusted for a customer (subject) is correct. Whether or not it is confirmed from the image of the customer reflected in the mirror. Since the eyepoint position of the customer's spectacle lens provided by the manufacturer is instructed by means such as sticking a sticker, the customer actually wears the spectacle lens. The spectacle store side checks whether or not the seal position matches.
JP-A-9-145324 JP 11-52307 A

However, in the method of setting an eye point by photographing as in Patent Document 1, the equipment, display monitor, operation device, and the like used for photographing are large, resulting in high costs. In addition, the photographing itself is time-consuming and requires a place for installing the device. Therefore, there is a need for an eye point position setting means that is simple and inexpensive.
Further, in the mirror method as in Patent Document 2, since the eye point position is not confirmed by the eyeglass store but by the customer who actually wears it, considerable skill is required to be able to perform such confirmation inspection. The Rukoto. Therefore, a simpler means for confirming the eye point position has been demanded.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide an eye point detection method and an eye point detection optometry mask that can set an eye point easily and confirm the set eye point position at low cost.

In the invention of claim 1 in order to solve the above problems, gripped wearer as eye mask on the object side of the spectacle frame of the wearer that wearing a spectacle frame lens is mounted is arranged adjacently The wearer himself / herself operates the optometry mask so that the eyesight can be viewed from the distance or near through the pinhole formed in the mask body of the optometry mask. The position of the pupil exposed in the pinhole from the front side of the mask body is marked on the lens by the tip of the marking tool, and the marking point position is set as the eye point position of the wearer. The gist.
Further, in the invention of claim 2, is gripped by the wearer as eye mask on the object side of the spectacle frame of the wearer who wear spectacles frame is disposed adjacent, the eye mask to the wearer's own The eyesight is viewed from the distance or near the target through the pinhole formed in the transparent or translucent mask body of the eye mask, and the examinee enters the pinhole from the front side of the mask body. Is measured as a direction and distance from the reference point of the spectacle frame based on the scale provided on the mask body, and the pupil position is set as the eye point position of the wearer. This is the gist.
The gist of the invention of claim 3 is that, in addition to the configuration of the invention of claim 2, a lens is mounted on the spectacle frame.
The gist of the invention of claim 4 is that, in addition to the configuration of any one of claims 1 to 3, the wearer grasps and operates the handle of the optometry mask.
Further, the gist of the invention of claim 5 is that, in addition to the structure of any one of claims 1 to 4, the diameter of the pinhole is 0.5 to 2.0 mm.

In the configuration as described above, two means are conceivable for measuring the eye point.
As a first means, an optometry mask is arranged on the object side of the spectacle frame of the wearer wearing the spectacle frame on which the lens is mounted. The optometry mask includes a thin plate-shaped mask main body, and a pinhole is formed in the mask main body so that the wearer can actively view the distance or near the visual target. Active refers to seeing the target through this pinhole as an active intention of the wearer, and if the person who moves by himself / herself is incapable of moving, the attendant moves on behalf of the wearer Is also included. The pinhole has a diameter of about 0.5 to 2.0 mm, more preferably about 1.0 to 1.5 mm. The shape is not particularly limited.
The position of the pupil exposed in the pinhole from the front side of the mask body is marked by the wearer himself or the examiner through the pinhole in the state of looking into the distance or near the target through such a pinhole. Mark on the lens with the tip of the point tool. If you mark the target with distance vision, the mark point position becomes the distance eyepoint. If you mark near the target, the mark point position becomes the near eyepoint. It becomes. This makes it possible to set the eye point and confirm the set eye point position at low cost and with ease. The marking tool is not limited to a writing instrument as long as it is a tool that can be marked on the lens surface by abutment.
The marking work by the tip of the marking tool is also performed by the wearer or the examiner. For example, the wearer or the examiner may carry out the marking work with the marking tool. You may make it hold | maintain on the holding member hold | maintained so that both position of a point position and a retracted position can be taken. That is, it may be executed by a separate mechanical mechanism. The holding member is provided with an operation section, and the marking tool is moved from the retracted position to the marking position by the operation of the operation section. In this case, the movement of the marking tool from the retracted position to the marking position is performed by releasing the urging force of the urging means in the locked state by the operation of the operation unit, and the exercising force is executed to ensure the marking operation. Preferred for easy implementation.
The means using such a holding member is particularly significant in the marking work by the wearer himself.

As a second means, an optometry mask is arranged on the object side of the spectacle frame of the wearer wearing the spectacle frame. The optometry mask has a transparent or semi-transparent thin plate-like mask body, and the mask body is formed with a pinhole for the wearer to actively view the distance or near the target. Yes. Active intention is the same as above. The diameter and shape of the pinhole are the same as described above.
Through such a pinhole, the pupil position that is exposed in the pinhole from the front side of the mask body is provided in the mask body by the examiner through the pinhole in a state of far vision or near vision with respect to the target. Measure based on the scale. Since the mask body is transparent or translucent, the eyeglass frame can be viewed through the mask body. The pupil position is determined by reading the scale on the mask body and in which direction the scale position is from the reference point of the spectacle frame (for example, the outer edge of the spectacle frame). The pupil position specified by the scale is the eye point position of the wearer. The pupil position specified by the scale in the distance viewed with respect to the target becomes the distance eyepoint, and the pupil position specified by the scale in the near vision with respect to the target becomes the near eyepoint. . This makes it possible to set the eye point and confirm the set eye point position at low cost and with ease.
Here, the scale provided on the mask main body may be only in one direction, but preferably the scale is provided in two or more different directions to more easily specify the pupil position. The scale crosses the eyeglass frame periphery when the examiner visually observes, and it is easy to measure it to be formed on the mask body long enough to measure the length beyond the general eyepoint position from the eyeglass frame periphery. This is preferable. In general, horizontal and vertical scales are easy to use. As an example of the scale, the direction that is placed horizontally so that it extends beyond the center of the nose pad on the nose side with the base point directly above the pinhole (this is generally about 40 mm), and the right side of the pinhole (preferably the ear side) A direction (generally about 20 to 30 mm) arranged vertically or vertically to the base point can be considered. The eyeglass frame may or may not be equipped with a lens.

In each of the above means, preferably, the mask body is basically provided with eye patch portions covering both eyes, and the pinhole is preferably formed only in one eye belt portion.
In the first place, when visualizing the target and deciding the position of the eye point based on the pupil position, it is more accurate to see the target with binocular vision rather than only one eye. Preferred for position determination. At that time, the eye to be examined should be made to see the target through the pinhole, and the eye not to be examined should be made to see the target at a free eye position regardless of the pinhole. It is preferable to form only on the side to be examined.
By the way, it is sufficient if the eye on the side to be examined at all times can correctly see the target from the pinhole. However, if the eye has a so-called “effective eye” and the non-optimized eye is the effective eye, only the effective side can be seen. There is a possibility that the distance vision or near vision is viewed, and the eye on the side to be examined cannot be correctly viewed through the pinhole. In such a case, it is preferable to cover the eye not to be examined with an opaque eye patch rather than forcibly binocular vision. It should be noted that the eye point detection optometry mask in which the mask body has an eye patch that covers only one eye is not excluded.
Further, the number of pinholes in the eye patch is not particularly limited, but it is preferable that only one eye hole exists in the eye patch. For example, it is possible to prepare pinholes for distance eyepoints and near eyepoints, but there is a hassle of mistaking them and telling the wearer the difference. Good.
Also, if the mask body is transparent or translucent, the wearer can easily see from the pinhole by seeing the surrounding scenery at the same time when looking at the distance or near vision of the target. It may not be introduced to the visual state of the mark. In addition, if the periphery of the pinhole is nearly transparent, the pinhole effect is difficult to obtain. Therefore, the periphery of the pinhole can be colored darker than the other parts of the mask body to facilitate visual introduction of the target from the pinhole of the wearer.
In addition, it is convenient for the mask body to be provided with a handle for the wearer to hold in order to operate with one hand. There is no need to have a handle when operating with both hands.

In the inventions of the above claims, it is possible to set an eye point and to confirm the set eye point position at a lower cost and more easily than in the prior art.
In addition, the present invention is often used in a case of newly making eyeglasses, that is, a case where a wearer uses a frame that has just been selected at the store of an eyeglass store and detects the positional relationship between the frame and the eye point. However, at that time, the lens in the frame has not yet entered the frequency. However, since the present invention has an effect of reducing the aperture for the eye to be examined by the pinhole, even if the wearer is not corrected for refraction by the spectacle lens or the contact lens, or the wearer is presbyopia. However, there is an advantage that it is easy to see a distant target and a nearby target.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
Example 1
As shown in FIG. 1, an eye point detection optometry mask 1 (hereinafter referred to as a mask 1) has an outer shape formed of a thin, translucent transparent plate made of polycarbonate. In this embodiment, the thickness of the mask 1 is 2 mm. The corners protruding outward from the mask 1 are chamfered. The mask 1 includes a handle 2 and a mask body 3 extending in a cantilever shape above the handle. The mask body 3 is formed with a mount on the nose 4 cut out in a Mt. Fuji shape at the center lower position in the left-right direction, and the left and right sides of the mask body 3 are the eye patch portions 5A and 5B, respectively. Here, the left side of the figure is the left eyepatch part 5A, and the right side adjacent to the handle 2 is the right eyepatch part 5B. A circular pinhole 6 communicating with the front and back sides is formed near the center in the right eyeband portion 5B. That is, when the handle 2 is used with the right hand, the pinhole 6 is looked into with the right eye, and when the handle 2 is gripped with the left hand, the front and back are reversed and the pinhole 6 is looked into with the left eye. In the first embodiment, the diameter of the pinhole 6 is 1.5 mm.
Scales 7a and 7b are printed at two locations on the right eye patch 5B of the first embodiment. The horizontal scale 7 a extends from the center position of the pinhole 6 to the center position of the nasal support unit 4. One scale is set at 1 mm. Both scales 7a and 7b are visible from both the front and back sides. On the front and back surfaces of the mask body 3 and on the periphery, a molding-like border 8 made of fine hair is attached.

(Example 2)
As shown in FIG. 2, Example 2 differs from Example 1 only in that the left eye patch 5A is opaquely colored, and thereafter has the same configuration as that of Example 1 (the colored state is indicated by hatching in the figure). .
(Example 3)
As shown in FIG. 3, the third embodiment is different from the first embodiment in that an opaque colored portion 9 having a darker color than the pinhole 6 is provided around the pinhole 6. (In FIG. 3, the boundary of light and shade is clear on the drawing, but in practice it is gradually darkened).
Example 4
As shown in FIG. 4, Example 4 is a mask 1 having an eye patch part that covers only one eye chamfered by cutting the left eye patch part 5 </ b> A in Example 1.

Next, a method for obtaining the positions of the far and near eyepoints using the mask 1 of the first to fourth embodiments will be described with reference to FIGS.
First, a case where a distance eyepoint is set will be described. As shown in FIG. 8, the wearer as the subject wears the spectacle frame F on which the lens L is worn correctly, and holds the handle 2 of the mask 1 with the right hand in the worn state as shown in the figure, Hold 4 to rest on your nose. At this time, the mask 1 is as close to the lens L as possible.
First, the wearer is caused to see far away. This is executed by instructing the wearer to visually observe an object or a picture at a certain distance away from the pinhole 6 as a target. The examiner turns to the front of the wearer, inserts the tip of the pen P as a marking tool from the front side of the pinhole 6 as shown in FIG. In this way, the state where the wearer is viewing from the pinhole 6 is not fixed, and the distance eyepoint of the wearer exists on a straight line connecting the pupil and the pinhole 6, so this mark point position is This indicates the distance eye point position.
Next, a case where a near eye point is set will be described. When the mark point of the distance eye point position is completed, the wearer is allowed to see the near vision. This is executed by instructing the wearer to view a book or paper piece (business card) at hand as a visual target. As shown in FIG. 10, the examiner inserts the tip of the pen P from the front side of the pinhole 6 from the front side of the pinhole 6 in the state where the near vision is viewed, and marks the pupil position on the lens L. Point. Similar to the above, this mark point position indicates the near eye point position.
Through such a series of operations, it is possible to mark the positions of the far and near eyepoints of the right eye of the wearer on the right lens L.
Next, the mask 1 is inverted, and the positions of the far and near eyepoints of the left eye of the wearer are marked on the left lens L in the same process for the left eye.

By comprising in this way, when the mask 1 of Example 1-4 is used, the following effects are show | played.
(1) Since the wearer is merely forced to perform distance and near vision and is not forced to perform particularly troublesome work, it is easy to obtain cooperation for setting the position of the eye point on the lens. The side (generally a spectacle store, an ophthalmologist, a vision trainer, etc.) is also advantageous because it can obtain an accurate eye point position even though no special device is required.
(2) The so-called pinhole effect that the depth of focus becomes deeper and the object becomes easier to see when viewed through the pinhole makes it easier for the wearer with myopia, hyperopia, or presbyopia to see the index and to perform the inspection. Further, since the examiner only has to insert the pen P into the pinhole, there is no trouble in the work on the inspection side.
(3) Since the pinhole 6 is provided with scales 7a and 7b, the distance from the inner side and the lower side of the frame F at the pupil position can be measured simultaneously. For example, the tip of the pen P toward the own eye It is possible to cope with a wearer who hates to approach.
(4) In the first embodiment, the mask 1 is configured to be translucent, and the indicator can be viewed while simultaneously viewing the surrounding scenery around the pinhole 6, so that it does not become a hard atmosphere such as an inspection and is worn by tension. Unnecessary adjustments are not generated on the user side. In addition, it is easy to look for indicators.
(5) For example, when the eye on the side that has not been examined is an effective eye, if the eye is not covered, there is a possibility that the eye point of the eye on the side of the optometry will be shifted. The eye that is not the eye on the side being covered is covered with the opaque left eyeband portion 5A, and thus does not hinder optometry. On the other hand, if the eye on the optometry side can look through the pinhole after viewing the target with both eyes, the one-eye type mask 1 as in Example 3 can be used.
(6) Since the border 8 is adhered to the front and back of the mask body 3, the lens L will not be damaged even if the wearer brings the mask 1 close to the spectacle frame F.

(Example 5)
As shown in FIGS. 5 to 7, a marking mechanism 10 is provided on the surface side of the mask 1 having the same configuration as that of the first embodiment (however, in the fifth embodiment, the scales 7 a and 7 b are not provided). The marking mechanism 10 includes a marking part 11 as a holding member and a lever 12 as an operation part. The mark portion 11 is pivotally supported by a shaft 14 with respect to a bearing 13 erected on the mask body 3. The mark part 11 is composed of a main body 15 and a protrusion 16 formed on the upper part of the main body 15. A tampo portion 17 soaked with ink is attached to the tip of the protruding portion 16. The marking part 11 corresponds to a marking tool. A column base 18 is erected at a position adjacent to the bearing 13. A coil spring 20 is disposed between the main body 15 of the marking point 11 and the column base 18, and the marking point 11 is urged by the coil spring 20 in a direction away from the column base 18. The lever 12 is pivotally supported by a shaft 19 at the tip of the column base 18 so as to be rotatable. A hook 21 is formed at the tip of the lever 12 and can be engaged with the tip of the main body 15. A leaf spring 22 is disposed between the lever 12 and the column base 18, and the lever 12 is urged by the leaf spring 22 so as to rotate counterclockwise in the drawing.
As shown in FIG. 6, the mark portion 11 is erected and held on the bearing 13 in the casing engaged by the hook 21 at the tip of the lever 12. On the other hand, as shown in FIG. 7, in a state in which the engagement between the marking portion 11 and the hook 21 is released, the marking portion 11 is rotated by the urging force of the coil spring 20, and the protrusion 16 is placed in the pinhole 6. It is supposed to be inserted.

Next, a method for obtaining the positions of the far and near eyepoints using the mask 1 of the fifth embodiment will be described with reference to FIGS.
The wearer wears the spectacle frame F correctly in the same manner as in the first embodiment, and holds the handle 2 of the mask 1 with the right hand as shown in the figure, and the upper nose placement portion 4 is placed on his nose. Prepare to be placed. First, the lever 12 is pulled with the index finger of the hand holding the handle 2 in the state of far vision as described above. Then, in FIG. 6, the lever 12 is pivoted about the shaft 19 in the clockwise direction on the base side as shown by the arrow p, and the tip of the lever 12 is turned counterclockwise as shown by the arrow q. Then, the engagement state between the hook 21 at the tip of the lever 12 and the main body 15 of the marking portion 11 is released, and the marking portion 11 is moved around the shaft 14 as indicated by an arrow r in FIG. Is rotated. The protruding portion 16 of the marking point portion 11 is inserted into the pinhole 6, and the tampo portion 17 at the tip thereof contacts the surface of the lens L to be marked. On the other hand, the lever 12 rotated as indicated by the arrow p is held slightly downwardly by the leaf spring 22 as indicated by the arrow s.
With the end of the distance eye point marking operation, the mask 1 is once lowered from the nose, the marking portion 11 is set to the state shown in FIG. 6 again, and the near eye point is marked by the same operation. Through such a series of operations, it is possible to mark the positions of the far and near eyepoints of the right eye of the wearer on the right lens L.
Next, using the mask 1 (not shown) having a mirror image relationship with the mask 1, the positions of the far and near eyepoints of the wearer's left eye are marked on the left lens L in the same process for the left eye. Point.
The fifth embodiment is basically based on the premise that the wearer himself operates the lever 12 to mark the eye point, but this does not exclude that the examiner operates on behalf of the wearer.
By configuring in this way, when the mask 1 of Example 5 is used, in addition to the above effects, the wearer himself can mark the eye point without being bothered by the examiner, and special troublesome work can be performed. There is an effect that it is not forced.

In addition, this invention is not limited to the said Example, It is also possible to change and actualize as follows.
-You may put a degree in the lens. Further, if it is known that the mask 1 of Example 1 is used without marking, a lens is unnecessary.
-For example, the mask 1 may be composed of a plurality of portions such that the handle 2 is overlapped with the mask main body 3 or the left and right eye patch portions 5A and 5B are overlapped, and these may be overlapped. As a method of overlapping, for example, it is assumed that each part is rotated around an axis, or a crease is provided between adjacent parts and folded. If constituted in this way, for example, it is possible to easily carry it in such a way that it is always inserted into the examiner's pocket.
The number and direction of the scales 7a and 7b are merely examples, and the scales can be configured with other patterns.
-It is free to adopt means for preventing scratches other than the edging 8. For example, the material of the mask 1 may be flexible so that the lens is not easily damaged, or the entire surface may be flocked. Further, since the lens is generally projected forward with a meniscus lens, and especially the vicinity of the pinhole 6 is considered to be easily contacted with the mask 1, means for preventing scratches only in a certain range around the pinhole 6 (for example, flocking is performed) You may make it give a seal | sticker, a felt, etc.).
-The border 8 may not be particularly required. For example, instead of providing the edging 8, the mask 1 may be made of a soft material such as silicone, or a film of silicone material may be adhered to the front and back to ensure transparency.
The shape, material, and thickness of the mask 1 are not limited to the above. Further, the handle 2 may not be provided.
The configuration of the marking mechanism 10 may be other than the above.
In addition, it is free to implement in a mode that does not depart from the spirit of the present invention.

The front view of the optometry mask for eyepoint detection in Example 1 of this invention. FIG. 5 is a partially cutaway front view of an eye point detection optometry mask in Embodiment 2 of the present invention. FIG. 6 is a partially cutaway front view of an eye point detection optometry mask in Embodiment 3 of the present invention. FIG. 10 is a partially cutaway front view of an eye point detection optometry mask in Example 4 of the present invention. FIG. 10 is a partially cutaway front view of an eye point detection optometry mask according to a fifth embodiment of the present invention. Explanatory drawing explaining the marking work which uses the eye test mask for eyepoint detection in Example 5 of this invention. Explanatory drawing explaining the marking work which uses the eye test mask for eyepoint detection in Example 5 of this invention. Explanatory drawing explaining the optometry work which determines the eye point position using the optometry mask for eye point detection in Examples 1-4 of this invention. Explanatory drawing explaining the state marked by the examiner in the optometry work which determines the distance eye point position in FIG. Explanatory drawing explaining the state marked by the examiner in the optometry work which determines the near eye point position in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Eye mask for eye-point detection, 3 ... Mask main body, 6 ... Pinhole, 7a, 7b ... Scale.

Claims (5)

Let the wearer hold the eyepiece mask so that the eyeglass mask is placed adjacent to the object side of the eyeglass frame of the wearer wearing the eyeglass frame with the lens attached, and let the wearer himself operate the eyepiece mask. Through the pinhole formed in the mask body of the optometry mask, the target is viewed from the distance or near, and is exposed in the pinhole from the front side of the mask body by the wearer or the examiner. A method of detecting an eye point, wherein a pupil position is marked on the lens by a tip of a marking tool, and the marking point position is set as the eye point position of the wearer. The wearer wears the spectacle frame so that the wearer holds the optometry mask adjacent to the object side of the spectacle frame, and the wearer himself operates the optometry mask to Through the pinhole formed in the transparent or translucent mask body, the target is viewed for distance or near vision, and the examinee positions the pupil position exposed in the pinhole from the front side of the mask body. An eye point detection method, comprising: measuring a direction and a distance from a reference point of the spectacle frame based on a scale provided on a mask body, and setting the pupil position as the eye point position of the wearer. The eyepoint detection method according to claim 2, wherein a lens is attached to the eyeglass frame. Wearer eye point detecting method according to any one of claims 1 to 3, characterized that you operation by gripping the handle of the eye mask. Eye point detecting method according to any one of claims 1-4 the diameter of the pinhole characterized that you have been as 0.5 to 2.0 mm.

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